When a IE is added to the list, it's also added to a dictionary. When a IE is requested it first looks in the dictionary and if there's no instance it will create a new one.
That way _real_initialize is only called once for each IE, saving time if it needs to login for example.
Some urls from the French version of the page could download the German version.
Also instead of extracting the json url from the webpage, build it to skip the download
A string statement is not a docstring if it doesn't occur right at the top
of modules, functions, class definitions etc.
This patch fixes it.
Signed-off-by: Rogério Brito <rbrito@ime.usp.br>